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(No Model) BAUMGARTEN.

STEAM ENGINE.

No. 288,858. Patented Aug. 21, 1888.

WITNESSES: INVENTOR;

V 4` BYv l v ATTORNEYS,

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' UNITED STATES PATENT OFFICE,

CARL BAUMGARTEN, OF BERLIN, GER-MANY.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 283,558, dated August21, 1883. Appnmnon mea July e, insa. No mona.)

To @Zi whom t 'nw/y concern,.- l

Be it known that l, CARL BAUMGARTEN, of the city of Berlin, Prussia,have invented a new and useful Improvement in Steam-E1n gines YVorkin gW'ithout a Dead-Point, of which the following is a full, clear, andexact descrip tion.

rEhe object of my invention is to provide a new and improvedsteam-engine which works without a dead point or center, and can bestarted at all times without any additional help, whatever the positionof the crank may be.

The invention consists in a steainengine having a block secured to thepiston-rod, which block is provided with a diagonal slot through whichthe crank-pin passes, the said slot having concaved edges facing eachother, and being also provided with a recess at each end. Theslide-vulve is attached to a rod suspended from levers provided at thelower ends with tappets, against which the ends of the sliding block canstrike, ithereby reciprocating the slide-valve rod. The levers fromwhich the said rods are suspended `arc provided with springarnis forgiving the desired degree of expansion.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure l is a longitudinal sectional elevation or' my improvedsteanilengine. Fig. 2 is a plan view of the saine, parts being shown insection.

The piston A, working in the cylinder B, is provided with a piston-rod,C, attached to an upright sliding plate or block, D, provided with adiagonal' slot, E, extending from the upper corner nearest thepiston-head to thc opposite lower corner, through which slot across-piece, F', of the crank F on the main shaft G passes. The sides ofthe slot are curved,

or made segmental, so that the two concave curves will face each other,and the slot will bc wider at the middle than at the ends.' At each endthe slot is provided with a seinicircular recess, a. Theslide-valve H,for admit ting steam into the ends ofthe cylinder, is attached to a rod,J, which is suspended fromtwo levers, K, pivoted aboveY the rod J, whichlevers have tappets L projecting from the lower ends such a distancethat theT can be struck by the ends of the sliding plate D. At

the upper ends the levers K are provided with rectangular springarins M,which are adapted to strike on rods N, for a purpose that will be setforth hereinafter. The block D is suitably. guided between tracks O. Y

As shown, the crank F stands vertically, and is in the top recess, a,and as the block D tends to nieve from the end of the cylinder the crankis swung downward and out of the recess a, and when the piston hascompleted its stroke the crank stands at an angle of fortyfive degrees.The piston then begins to make its return-stroke, and that edge of theslot E farthest from the piston acts on the crosspiece of the crank andswings the saine down into a horizontal position, and then down wardYuntil the crank is again at an inclination of forty-five degreesdownward to the piston, when the block D begins its return-stroke andthe piston is swung to the horizontal position, and the size of theangle the slot forms with the crank is large enough to obtain inipellingcomponents which are in the direction of the rotation. At the end ofeach stroke the block D strikes one of the tappets L and nieves theslide-valve H in one direction or the other. lf the block D strikes oneof the tappets L, the corresponding spring-arm M is bent, and when theblock D lel ves thesaid" tappet the reaction of the spring throws therod J and the slide H back suffi ciently to obtain the desired degree ofexpansion.

I do not abandon or dedicate to the public any patentable feature setforth herein and not hereinafter claimed, but reserve the right to claimthe saine, either in a reissue of anlv patent that may be granted uponthis application or in other applications for Letters Pat-l ent that Imav make.

Having thus described in v invention, what I claim as new, and desire tosecure by Letters Patent, is f 1. The herein-described device forconverting reciprocating inotion, consisting of aslding block providedwith a slot, the edges of which act on the crank in such a manner as IOOto rotate it in all positions of the crank, substantially as hereinshown and described, and

for the purpose set forth.

2. The combination, With a cylinder and piston, of a block provided witha diagonal slot, through which the crank-pin passes, sub` stantially asherein shown and described and for the purpose set forth.

3. The combination, With a cylinder and piston, of a sliding blockattached to the piston-rod and provided with a diagonal slot, the

` Width of which increases from the ends toward 5. The combination, witha cylinder and piston, of a sliding block attached to the piston-rod andprovided with a diagonal slot -having concave edges, and a semicircularrc- 2 5 cess at each end of the slot, substantially as herein shown anddescribed, and for the purpose set forth. y

6. The combination, with a piston-cylinder and slide-valve, of a slidingblock provided 3o- With a diagonal slot, through which the crankpinpasses, a rod secured to the slide-valve, levers from which the said rodis suspended, and tappets projecting from the lower ends of the rod,substantially as herein shown and de- 3 5 scribed, and for the purposeset forth.

CARL BAUMGARTEN.

Witnesses: i

B. ROI, J. M. RENNERT.

